Electronic device

ABSTRACT

The electronic device can be used with an accessory module that is a second device attached to a device main body that is a first device. The accessory module includes a locking member that is held so as to be able to be turned. The locking member includes a ring-shaped portion that has a plurality of claw portions and an operation portion for performing a turning operation. The device main body 1 includes a plurality of claw portions corresponding to the plurality of claw portions of the locking member. The claw portions and the claw portions engage with each other in a state in which the accessory module is attached to the device main body by the turning operation of the operation portion, and the claw portions and the claw portions are not engaged in a state in which the accessory module can be removed from the device main body.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a Continuation of U.S. patent application Ser. No. 15/944,853, filed Apr. 4, 2018, which is a Continuation of International Patent Application No. PCT/JP2016/004758, filed Oct. 28, 2016, which claims the benefit of Japanese Patent Application No. 2015-213882, filed Oct. 30, 2015, Japanese Patent Application No. 2016-150461, filed Jul. 29, 2016 and Japanese Patent Application No. 2016-211645, filed Oct. 28, 2016. The contents of these applications are hereby incorporated by reference herein in their entirety.

BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates to an attachment and detachment mechanism for a module in an electronic device that can be used with the module attached thereto.

Background Art

In an imaging device such as a digital camera, an image signal, image information, and the like output from an imaging element are recorded as data files. An imaging lens causes an optical image to be formed on the imaging element, and compression processing in a file format of Joint Photographic Experts Group (JPEG) or the like is performed on image data obtained by photoelectric conversion in the imaging element, for example.

An electronic device including an imaging device can realize an electronic device which is a so-called modular assembly electronic device that has desired functions, by assembling modules such as blocks that are caused to have predetermined functions, by collecting together a plurality of parts. Patent Literature 1 discloses a technology that enables improvement in usability and securing fixing of a module at the same time without using a fastener by using an electromagnetic attachment and detachment mechanism for attaching and detaching the module.

In addition, Patent Literature 2 discloses a technology that enables attachment and detachment of a replacement lens to and from a main body of an imaging device. A lens mount for a user to attach and detach a replacement lens that has a bayonet claw portion (112) to and from the main body of the imaging device is provided. The user rotates a movable mount portion about an optical axis from a state in which the bayonet claw portion and a claw portion (241) of the movable mount portion do not overlap on an optical axis projection. In this manner, the movable mount portion moves toward a first fixation portion (21) in an optical axis direction when a female screw portion formed at a fixed mount portion and a male screw portion formed at the movable mount portion are screwed together, and the claw portion and the bayonet claw portion come into contact with each other.

CITATION LIST Patent Literature

Patent Literature 1: Japanese Patent Laid-Open (Translation of PCT Application) No. 2014-508998

Patent Literature 2: Japanese Patent Laid-Open No. 2013-218149

According to the configuration disclosed in Patent Literature 1, the weight of each accessory module including the weight of an electromagnet is high. Therefore, there is a likelihood that a user may inadvertently drop the electronic device, and there is a concern that any of the accessory modules may fall off the device main body at the time of dropping since no physical holder is provided. In addition, in a case of a modular assembly electronic device, heat sources may become concentrated depending on how the modules are assembled, and there may be a problem of increase in temperature. It is necessary to shorten an operation time of this device in order to curb an increase in temperature, otherwise there is a likelihood that the functions and performance of the device may become restricted.

In addition, it is difficult for an increase in size of the device to be avoided in the configuration disclosed in Patent Literature 2 due to screw movement of the movable mount portion and attachment of an operation member of the movable mount portion although it is possible to reliably fix the accessory module.

An object of the present invention is to provide a small-sized electronic device that can be used with the second device reliably attached to the first device.

SUMMARY OF THE INVENTION

According to an embodiment of the present invention, there is provided an electronic device that can be used with a first device attached to a second device, the electronic device including: a locking member that is provided in the first device and fixes the first device to the second device when the second device is attached to the first device, in which the locking member has a first engagement portion and an operation portion, the second device has a second engagement portion that engages with the first engagement portion, the operation portion is able to be operated turned between a licked position and a locking released position, the first engagement portion and the second engagement portion engage with each other by the operation portion being operated to be turned into the locked position when the second device is attached to the first device, the engagement between the first engagement portion and the second engagement portion is released by the operation portion being operated to be turned into the locking released position when the second device is attached to the first device, and an amount of projection of the operation portion from a case body of the first device or the second device when the operation portion is located at the locking released position is greater than an amount of projection of the operation portion from the case body of the first device or the second device when the operation portion is located at the locked position.

According to the present invention, it is possible to provide a small electronic device that can be used with a second device reliably attached to a first device.

Further features of the present invention will become apparent from the following description of exemplary embodiments with reference to the attached drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1A and 1B are exterior perspective views of a device main body of an electronic device according to a first embodiment of the present invention.

FIGS. 2A and 2B are exterior perspective views illustrating a module removed from the device main body according to the first embodiment.

FIGS. 3A and 3B are exploded perspective views of the module according to the first embodiment

FIG. 4A is a front view of the electronic device according to the first embodiment and FIG. 4B is a sectional view taken along the A-A portion.

FIGS. 5A and 5B are diagrams for explaining state transition of the electronic device according to the first embodiment.

FIGS. 6A and 6B are exterior perspective views illustrating an example of use of the electronic device according to the first embodiment.

FIGS. 7A and 7B are exterior perspective views illustrating a module removed from an electronic device according to a second embodiment of the present invention.

FIGS. 8A and 8B are diagrams for explaining state transition of the electronic device according to the second embodiment.

FIGS. 9A and 9B are exterior perspective views of an electronic device according to a third embodiment of the present invention.

FIG. 10 is an exterior perspective view of an electronic device according to a fourth embodiment of the present invention.

FIG. 11 is a perspective view illustrating, from a front face side, a device main body with a module removed therefrom according to the fourth embodiment.

FIG. 12 is a perspective view illustrating, from a back face side, the device main body with the module removed therefrom according to the fourth embodiment.

FIG. 13 is an exploded perspective view of the device main body according to the fourth embodiment.

FIG. 14 is an exploded perspective view illustrating a back surface portion of the device main body according to the fourth embodiment.

FIGS. 15A and 15B are exploded perspective views illustrating a part of the device main body according to the fourth embodiment in an exploded manner.

FIGS. 16A and 16B are diagrams for explaining a locked position and an unlocked position according to the fourth embodiment.

FIGS. 17A and 17B are perspective views for explaining a relationship between a locking member and a module according to the fourth embodiment.

FIG. 18 is an exploded perspective view of the module according to the fourth embodiment.

FIGS. 19A and 19B are sectional views of a state in which a module is attached to the device main body according to the fourth embodiment.

FIG. 20 is an enlarged view (in a case in which no heat transfer member is provided) illustrating a B portion in FIG. 19A.

FIGS. 21A to 21C are diagrams for explaining an engagement relationship of claw portions in a radial direction and a thrust direction.

FIGS. 22A and 22B are diagrams illustrating a configuration example of the locking member.

FIG. 23 is a schematic view illustrating, as an example, a form of use of the device main body and the module.

FIG. 24 is a perspective view illustrating a specific example in FIG. 23 from a back face side.

FIG. 25 is a perspective view illustrating the specific example in FIG. 23 from a front surface side.

FIG. 26 is a perspective view illustrating, as another example, a form of use of the device main body and the module.

FIG. 27 is a perspective view illustrating, from the front surface side, the device main body and the module in FIG. 26.

FIG. 28 is a perspective view illustrating, from the front face side, a module removed from a device main body according to a fifth embodiment.

FIG. 29 is a back view of the device main body according to the fifth embodiment.

FIG. 30 is a perspective view of a locking member according to the fifth embodiment.

FIG. 31 is a diagram of the electronic device in a locked state, in which the device main body and the module are connected to each other, when viewed from the back face side according to the fifth embodiment.

FIGS. 32A and 32B are sectional views taken along the A-A portion and the B-B portion illustrated in FIG. 31.

DESCRIPTION OF THE EMBODIMENTS

Hereinafter, the respective embodiments of the present invention will be described in detail with reference to the accompanying drawings. An electronic device according to the embodiments is a modular assembly electronic device that can be used in such a manner that a second device is attached to a first device. The following description will be given on the assumption that the first device is a main body of the electronic device and the second device is a module device.

First Embodiment

Referring to FIGS. 1 to 6, a first embodiment of the present invention will be described. FIGS. 1A and 1B are explanatory diagrams of an electronic device according to the embodiment. FIG. 1A is a perspective view in which the electronic device is viewed from the front side, and FIG. 1B is a perspective view in which the electronic device is viewed from the back side. Hereinafter, positional relationships between respective portions will be described by defining a subject side as the front side.

An imaging portion 2 is fixed to amain body of the electronic device (hereinafter, referred to as a device main body) 1. The imaging portion 2 is included in an imaging optical system that forms an image of light from a subject. An imaging element is mounted on the back side of the imaging portion 2 inside the device main body 1. The imaging element is a charge coupled device (CCD) image sensor, a complementary metal oxide semiconductor (CMOS) image sensor, or the like that performs photoelectric conversion on the optical image to generate image data. Amain substrate, a complementary substrate, or the like on which electronic parts such as a processing circuit to convert the image data generated after imaging into digital information are mounted is disposed in the device main body 1.

A release button 4 is provided on an upper surface portion of the device main body 1. A two-stage pressing operation can be performed on the release button 4. If a user performs a half-pressing operation on the release button 4, an imaging preparation operation (a light measurement operation, a distance measurement operation, and the like) is started. Further, if the user performs a full-pressing operation on the release button 4, an imaging operation of the subject is started, and the captured image data is recorded in a recording medium. The recording medium can be attached to an accommodation chamber 5.

A side surface portion of the device main body 1 is provided with an input and output socket (not illustrated) for a power source and signals and is covered with a protection socket cover 6. The user can open the socket cover 6 to insert various cables into the input and output socket and pull the cables out of the input and output socket. Two modules 20 are attached to the back surface portion of the device main body 1. The user can detach an accessory module 20 by performing an operation of turning the locking member 11. The locking member 11 can be operated between a locked position and a lock released position.

The accessory module (hereinafter, simply referred to as a module) 20 includes the following modules, for example.

-   -   A power source module that accommodates a main battery (a         primary battery or a secondary battery) that is a power source     -   An external I/O (input and output) module that has a connector         that communicates with an external device     -   A NFC (near field communication) module that performs near-field         wireless communication     -   A communication module that transmits and receives data in         wireless communication with an external device     -   A speaker module that outputs music and operation sounds     -   A microphone module that inputs sound     -   A recording module with a large capacity for saving data that         exceeds the capacity of the recording medium     -   A display module provided with a liquid crystal display (LCD),         or the like     -   A cooling portion that accumulates heat generated by the device         main body 1 or the modules 20

The user can select a module in accordance with a required function and can use a desired module by attaching the module to the back surface portion of the device main body 1.

Referring to FIGS. 2A and 2B, removal of the module 20 from the device main body 1 will be described. FIG. 2A is a perspective view of a case in which a removed state of the modules 20 from the device main body 1 is viewed from the front side. FIG. 2B is a perspective view of a case in which the removed state of one module 20 is viewed from the back side.

The user turns an operation portion 11 a of the locking member 11 located at an edge (corner edge) of the electronic device by a predetermined angle in a predetermined direction for removing the module 20 from the device main body 1. The predetermined direction is a counterclockwise direction when viewed from the front as represented by the arrow in FIG. 2A. The operation portion 11 a is located in a notch portion 3 formed at the edge of the electronic device and is exposed to the outside.

A plurality of claw portions 11 b are provided as engagement portions inside a ring-shaped portion 11 d (see FIG. 3B) of the locking member 11. In the embodiment, the claw portions 11 b are located at four positions in the ring-shaped portion 11 d. Four claw portions 10 are provided in the device main body 1 as engagement portions that respectively correspond to the plurality of claw portions lib. It is possible to release the attachment of the module 20 by the claw portions 11 b and the claw portions 10, which form the engagement portions, moving from a locked position at which the claw portions 11 b and the claw portions 10 overlap in projection when viewed from a front-back direction to a lock released position at which the claw portions 11 b and the claw portions 10 do not overlap. That is, when the locking member 11 is located at the locked position, the plurality of claw portions 11 b and the plurality of claw portions 10 are brought into a mutually engaged state. When the operation portion 11 a is located at the lock released position, the plurality of claw portion 11 b and the plurality of claw portions 10 are brought into a state in which the engagement is released.

When the locking member 11 is located at the locked position, the operation portion 11 a does not project from a case body of the module 20 (see FIG. 5A). In the embodiment, when the locking member 11 is located at the locked position, the operation portion 11 a is accommodated in the notch portion 3 formed in the case body of the device main body 1 and also does not project from the case body of the device main body 1.

When the locking member 11 is located at the lock released position, the operation portion 11 a projects from the case body of the module 20 (see FIG. 5B). In the embodiment, when the locking member 11 is located at the lock released position, the operation portion 11 a is not accommodated in the notch portion 3 formed in the case body of the device main body 1 and also projects from the case body of the device main body 1.

Electrical communication connection terminals 13 b (eight positions in the drawing) are exposed from the module 20 on the side of the device main body 1. The electrical communication connection terminals 13 b are arranged inside the ring-shaped portion 11 d of the locking member 11, and when the module 20 is attached to the device main body 1, electrical connection with electrical communication connection pins 8 (eight positions in the drawing) provided in the device main body 1 is established.

A heat transfer member 14 is arranged to be adjacent to the electrical communication connection terminals 13 b. The heat transfer member 14 is press-fitted to a heat releasing panel 7 of the device main body 1 in a state in which the module 20 is attached to the device main body 1. The heat releasing panel 7 is a heat releasing member that releases heat generated by a heat source inside the device main body 1. The heat from the heat releasing panel 7 is delivered to the heat transfer member 14 between the device main body 1 and the module 20. The heat transfer member 14 generally includes a block formed of a material with a high heat transfer rate, such as copper or aluminum, and a plate member made of an extruded material. In the embodiment, a heat transfer rubber member made of an elastic body that freely stretches is accommodated inside the heat transfer member 14. The heat transfer rubber member has tackiness and adhesiveness, absorbs any inclination of a contact surface between the device main body 1 and the module 20, and exhibits a good heat releasing effect. The material of the heat transfer rubber member may be silicone rubber or the like.

FIG. 3A is an exploded perspective view in which the module 20 is viewed from the front side. FIG. 3B is an exploded perspective view in the state in which it is viewed from the back side. In the embodiment, a power source module that accommodates a main battery that serves as a power source will be exemplified, and the configuration thereof will be described in detail.

The power source module 20 supplies a voltage and a current necessary for the device main body 1 and the respective parts of the modules. As a battery 16 for the power source module 20, a lithium ion battery, a fuel battery, or the like is used and is accommodated in the module cover 18. A heat transfer panel 17 is wound around the periphery of the battery 16 and is thermally connected to the heat releasing panel 7 (see FIG. 2B) of the device main body 1 via the heat transfer member 14. Therefore, it is possible to curb local increase in temperature inside the device main body 1 by allowing the heat generated inside the device main body 1 to further diffuse from the periphery of the battery 16 to the periphery of an exterior of the module.

The semicircular heat transfer member 14 includes a heat transfer panel member 14 a and a heat transfer rubber member 14 b. The heat transfer rubber member 14 b is accommodated in the heat transfer panel member 14 a and is fixed thereto with double-sided tape or the like. The heat transfer rubber member 14 b made of an elastic body that freely stretches can hold a state of being charged by both the heat releasing panel 7 of the device main body 1 and the heat transfer panel 17 of the module 20 when the module 20 is attached to the device main body 1. Use of the heat transfer rubber member 14 b leads to a good heat transfer effect. However, in a case in which the heat transfer rubber member 14 b is exposed to exterior portions, there are concerns such as discoloration due to aging and deterioration of the heat transfer effect due to adhesion of dust due to the stickiness. Thus, a configuration in which the heat transfer rubber member 14 b is protected by the heat transfer panel member 14 a is employed in the embodiment. A flange shape 14 a a is provided over the entire periphery of the heat transfer panel member 14 a. In order to prevent the heat transfer member 14 from falling out of the module 20, a contact holder 13 retains the heat transfer panel member 14 a.

A dust proofing sheet 15 is interposed between and fixed by the contact holder 13 and the module cover 18 in a state in which only a connection route of the heat transfer member 14 and the heat transfer panel 17 is opened. In this manner, dustproof properties and drip-proof properties of the module 20 are enhanced. The contact holder 13 has an opening 13 a into which the heat transfer member 14 is inserted. The semicircular opening 13 a functions to cause the heat transfer member 14 to be exposed outside of the module. The electrical communication connection terminals 13 b (eight positions in the drawing) of the contact holder 13 are exposed outside of the module and are brought into contact with the connection pins 8 (see FIG. 2B) of the device main body 1 when attached to the device main body 1. The contact holder 13 includes resin parts, and the plurality of electrical communication connection terminals 13 b are integrated by insert molding. The electrical communication connection terminals 13 b are soldered and connected to the battery 16 or the like with a cable or the like (not illustrated).

The operation portion 11 a and the ring-shaped portion 11 d are integrally formed in the locking member 11. The locking member 11 includes the claw portions 11 b at four positions in an inner periphery of the ring-shaped portion 11 d. The ring-shaped portion 11 d of the locking member 11 is interposed between a sliding surface portion 13 c of the contact holder 13 and a flange portion 12 c of the fixed mount portion 12 and fits thereinto in a slidable state. A volatile sliding grease (low friction) or the like is applied to a portion along which the ring-shaped portion 11 d slides in order to improve durability and reduce roughness during the rotation. Concave portions 11 c are respectively formed in the front-back direction at two portions at which the operation portion 11 a projects in a circumferential direction. The module cover 18 includes a metal spherical body 21 and an elastic member 22 as a biasing member therefor. The metal spherical body 21 is configured to be engaged with the concave portions 11 c and hold the position of the operation portion 11 a in the locked position or the lock released position.

A plurality of through-holes 12 a are formed at edges of the fixed mount portion 12. A plurality of screws 19 are inserted into the through-holes 12 a and are fastened to tap holes formed in the module cover 18, and the assembly of the module is thus completed.

FIG. 4A is a front view of the device main body 1. FIG. 4B is a sectional view taken along the A-A portion in FIG. 4A. The respective drawings illustrate a state in which the module 20 is attached to the device main body 1. A plurality of lenses 2 a are arranged inside the imaging portion 2 fixed to the device main body 1. An imaging element 2 b is mounted on the back side of the lens group and performs photoelectric conversion on an optical image to generate image data. Amain substrate 22 and an auxiliary substrate 23 are arranged on the side of the lens group and the imaging element 2 b, and a processing circuit or the like to convert image data acquired by the imaging element 2 b into digital information is mounted. On the main substrate 22, an imaging portion, an image processing portion, a power supply switching circuit, a DC/DC converter, a system control portion, a serial interface (I/F) portion, a serial connection terminal, and the like are mounted. On the auxiliary substrate 23, a recording medium slot including a card I/F portion, an external power source input terminal, and the like are mounted.

The battery 16 occupies the largest part inside the module 20. Thermal connection between the device main body 1 and the heat releasing panel 7 is established from the heat transfer panel 17 wound around the battery 16 via the heat transfer member 14. Since the heat generated inside the device main body 1 is further diffused to the periphery of the exterior portion of the module from the periphery of the battery 16, it is possible to curb local increase in temperature inside the device main body 1.

The plurality of claw portions 11 b provided in the locking member 11 and the plurality of claw portions 10 provided in the device main body 1 overlap in projection when viewed from the front-back direction, and the module 20 is held in an attached state to the device main body 1. Since the corresponding claw portions 11 b and the claw portions 10 slidably fit into each other, it is possible to attach the module 20 to the device main body 1 in a state in which no backlash occurs. An O-ring 19 is arranged between standing walls of the claw portions 10 provided in the device main body 1 and the contact holder 13. In this manner, the dust proofing properties and the drip proofing properties between the device main body 1 and the module are enhanced.

Referring to FIGS. 5A and 5B, the state of the module 20 will be described. FIG. 5A is a diagram illustrating a locked state in which the plurality of claw portions 11 b and the plurality of claw portions 10 provided in the device main body 1 are engaged with each other and the module 20 is attached to the device main body 1. FIG. 5B is a diagram illustrating a lock released state in which the engagement between the plurality of claw portions 11 b and the plurality of claw portions 10 provided in the device main body 1 is released and the module 20 can be removed. Both diagrams illustrate a state in which the module 20 is viewed from the front face.

The user turns the operation portion 11 a at a predetermined angle in the counterclockwise direction in the paper plane of FIGS. 5A and 5B for removing the module 20 from the device main body 1. The claw portions 11 b of the locking member 11 and the claw portions 10 of the device main body 1 are turned from the locked position to the lock released position and are brought into a state in which both the claw portions 11 b and the claw portions 10 do not overlap when viewed in the front-back direction. Therefore, it is possible to release the attachment of the module 20. As illustrated in FIG. 5B, the operation portion 11 a projects in a state in which the operation portion 11 a is exposed from a range of a projection area of the device main body 1 in the front-back direction in the lock released position (see the hatched portion). In addition, the area in which the operation portion 11 a and the case body of the module 20 overlap in the projection increases, and the operation portion 11 a is accommodated in the case body of the module 20 in the locked position as illustrated in FIG. 5A. As illustrated in FIG. 5A, the operation portion 11 a does not project from the case body of the module 20 when the locking member 11 is located at the locked position. In the embodiment, the operation portion 11 a also does not project from the case body of the device main body 1 when the locking member 11 is located at the locked position. As illustrated in FIG. 5B, the operation portion 11 a projects from the case body of the module 20 when the locking member 11 is located at the lock released position. In the embodiment, the operation portion 11 a also projects from the case body of the device main body 1 when the locking member 11 is located at the lock released position. The projection amount by which the operation portion 11 a projects from the case body of the module 20 or the device main body 1 in the lock released position is greater than the projection amount by which the operation portion 11 a projects from the case body of the module 20 or the device main body 1 in the locked position.

The concave portions 11 c formed in the operation portion 11 a and the metal spherical body 21 accommodated in the module 20 are engaged, and the metal spherical body 21 is biased by the elastic member 22 (see FIGS. 3A and 3B). Therefore, the operation portion 11 a is configured to be held in the locked position and the lock released position.

FIG. 6A is a perspective view of a case in which the device main body 1 with a plurality of modules attached thereto is viewed from the front side. FIG. 6B is a perspective view of a case in which a state of the plurality of modules 20 removed from the device main body 1 is viewed from the front side. FIG. 6A illustrates a state in which another module 30 is attached between the device main body 1 and the power source module 20. A synchronization module 30 that is used for image capturing will be described as an example.

The synchronization module 30 performs control to prevent consistency from being lost due to an occurrence of time lag or the like between a transmission-side device and a reception-side device in a case in which a plurality of imaging devices perform image capturing simultaneously. A microcomputer and wired and wireless interface portions are mounted on the synchronization module 30. The synchronization module 30 corrects frames by external synchronization based on generator lock (GenLock), shares movie time codes in real time, or performs synchronous control of a time axis by using a built-in clock.

The synchronization module 30 has an operation button 31 on an upper surface portion. If the user presses the operation button 31, the imaging device on which the synchronization module 30 is mounted serves as a master device that manages control and operations of other imaging devices. The other imaging devices serves as slave devices that operate under one-way control of the master device, and roles are assigned to the other imaging devices. An LED 32 is a lighting up portion for identification. Since the LED 32 is turned on only for the synchronization module that has been recognized as the master device, the user can easily ascertain that the synchronization module is the master device. The synchronization module 30 includes the operation portion 11 a and is provided with a module attachment and detachment mechanism with respect to the device main body 1. Since the module attachment and detachment mechanism is similar to that in the case of the power source module, description thereof will be omitted.

According to the embodiment, a module is easily attached and detached in a small-sized electronic device with a module that is detachably attached thereto, and it is possible to reliably attach the module. In addition, it is possible to avoid local concentration of heat sources in the electronic device and to extend an operation time of the device. Note that although the configuration in which the locking member 11 is provided in the module 20 has been exemplified in the embodiment, a form in which the locking member 11 is provided in the device main body 1 is also possible.

Second Embodiment

Next, a second embodiment of the present invention will be described with reference to FIGS. 7 and 8. FIG. 7A is a perspective view in which a removed state of the module from the device main body according to the embodiment is viewed from the back face side. FIG. 7B is an exploded perspective view in that state. Hereinafter, only differences from the first embodiment will be described, and the same reference numerals that have already been used will be used for components that are similar to those in the first embodiment, and detailed description thereof will be omitted. Description will be similarly omitted in this manner in the embodiments described later.

The device main body 1 includes an operation portion 41 of a locking member. The operation portion 41, a ring-shaped portion 42, and claw portions 42 b (four positions) provided therein are formed as separate parts. The device main body 1 includes a rotation shaft 45 for the operation portion 41. The operation portion 41 is inserted into the rotation shaft 45 of the device main body 1 so as to be able to turn. In order to reduce the sound of collision against a portion of the device main body 1 with which it may come into contact, which can occur when the user operates the operation portion 41, the operation portion 41 is formed of resin such as polyacetal (POM) or polyamide (PA). The ring-shaped portion 42 of the locking member slidably fits in a state in which the ring-shaped portion 42 is interposed between a sliding surface 46 of the device main body 1 and the flange portion 44 c of a fixed mount portion 44.

A first teeth portion 41 a is formed in an outer periphery of a shaft fitting portion of the operation portion 41. A second teeth portion 42 d is formed in a predetermined range of an outer circumferential portion of the ring-shaped portion 42. The first teeth portion 41 a and the second teeth portion 42 d mutually mesh with each other in an assembled state (see FIGS. 8A and 8B). The ring-shaped portion 42 is biased in a predetermined direction (the counterclockwise direction in FIGS. 8A and 8B) by an elastic member 43. The elastic member 43 has one end attached to an attachment portion 42 c provided in the ring-shaped portion 42 and has an end on the opposite side, which is attached to an attachment portion provided in the device main body 1. A plurality of through-holes 44 a are formed at edges of the fixed mount portion 44, and a plurality of screws 47 are inserted thereinto. The screws 47 inserted into the through-holes 44 a are fastened to tap holes in the device main body 1.

FIGS. 8A and 8B are diagrams for explaining the electronic device in a state in which the modules have been removed. FIG. 8A is a diagram illustrating a state in which a module has been attached to the device main body 1. FIG. 8B is a diagram illustrating a state in which the module has been removed from the device main body 1. Both diagrams show a state in which the device main body 1 is viewed from the back face side.

The ring-shaped portion 42 is biased in the counterclockwise direction in FIGS. 8A and 8B by the elastic member 43 in a state in which the module 20 has been attached to the device main body 1. Since the first teeth portion 41 a meshes with the second teeth portion 42 d of the ring-shaped portion 42 in the operation portion 41, a turning force in the clockwise direction in FIGS. 8A and 8B is transmitted. Although claw portions of the module 20 are not illustrated in FIGS. 8A and 8B, a plurality of claw portions 42 b of the ring-shaped portion 42 and a plurality of claw portions provided in the module 20 overlap in projection when viewed from a direction perpendicular to the paper plane of FIGS. 8A and 8B, and the module 20 is retained. That is, a positional relationship in which the claw portions are engaged with each other has been achieved.

When the module is removed, the user performs an operation of turning the operation portion 41 in the counterclockwise direction. Since the second teeth portion 42 d meshes with and is coupled with the first teeth portion 41 a of the operation portion 41, the ring-shaped portion 42 is turned in the clockwise direction in FIGS. 8A and 8B against an elastic force of the elastic member 43. At this time, the elastic member 43 is in a stretched state. The plurality of claw portions 42 b of the ring-shaped portion 42 are turned to a position at which the claw portions 42 b do not overlap with the plurality of claw portions provided in the module 20 when viewed in a direction perpendicular to the paper plane of FIGS. 8A and 8B in projection. That is, a positional relationship in which the claw portions are not engaged with each other is achieved, and the attachment of the module 20 can be released. If the user releases an operation force that has been applied to the operation portion 41 at the non-engaged position, the locked ring-shaped portion 42 is turned in the counterclockwise direction, and the operation portion 41 is moved in the clockwise direction by the elastic force of the elastic member 43.

In the embodiment, the user performs an operation of turning the operation portion 41 provided in the device main body 1 when the module is attached and removed. As illustrated in FIG. 8A, the operation portion 41 slightly projects from the case body of the module 20 when the ring-shaped portion 42 is located at the locked position. In the embodiment, the operation portion 41 even slightly projects from the case body of the device main body 1 when the ring-shaped portion 42 is located at the locked position. As illustrated in FIG. 8B, the projection amount by which the operation portion 41 projects from the case body of the module increases when the ring-shaped portion 42 is located at the lock released position. In the embodiment, the projection amount by which the operation portion 41 projects from the case body of the device main body 1 also increases when the ring-shaped portion 42 is located at the lock released position.

Third Embodiment

Next, a third embodiment of the present invention will be described with reference to FIGS. 9A and 9B. FIG. 9A is a perspective view in which an electronic device according to the embodiment is viewed from the front side. FIG. 9B is a perspective view in which the state is viewed from the back side. A state in which four modules 20 have been attached to a device main body 50 is illustrated.

A cross-shaped rib 50 a is formed in a front face portion of the device main body 50. The front face portion of the device main body 50 is divided into four left, right, upper, and lower regions by the rib 50 a. The modules 20 are respectively attached to the four regions. The rib 50 a serves as a guide when the modules are attached to the device main body 50 and also has a function of enhancing rigidity of the device main body 50.

A plurality of modules can be attached to the front face portion of the device main body 50, and FIG. 9A illustrates a state in which a camera module 40 and other modules have been attached. The other modules include a power source module, an external I/O module, an NFC module, a communication module, a speaker module, a microphone module, a recording module, and the like. The attachment and the detachment mechanism of the respective modules is the same as that in the first embodiment.

The camera module 40 attached to the upper left position in FIG. 9A will be described in detail as an example. The camera module 40 includes a lens 2, optical members such as a diaphragm, and an imaging element that form an imaging optical system. A control portion in the camera module 40 performs control such as automatic zoom control, and control of automatic exposure (AE) for optimally setting an aperture value and a shutter speed, and imaging element sensitivity, automatic focus adjustment (AF), automatic white balance (AWB), and the like. An image signal acquired by the imaging element is processed by an image processing circuit, and an image recording circuit records the image signal in an image recording memory or the like. Camera modules 40 of several different types with different focal distances are provided, and the user can use a camera module 40 by attaching the camera module 40 to the device main body 1 in accordance with a purpose of image capturing. In a case in which the camera module 40 is attached to the device main body 1, the electronic device then has a specification mainly for performing operations of imaging stationary images and movies.

As illustrated in FIG. 9B, the device main body 1 includes a display portion 51 on a back surface portion thereof. The display portion 51 has a display device such as a LCD (liquid crystal display). The display portion 51 is used for checking a subject image and reproducing and displaying a captured image. The display portion 51 according to the embodiment includes a protection window, a touch panel, and a display panel. The protection window is formed of reinforced glass or transparent resin such as acrylic resin or polycarbonate resin with high transmittance for light in order to protect the display panel and the touch panel from scratching and contamination, and the thickness thereof is equal to or less than 1 mm. The outer size of the protection window is greater than that of the display panel to protect the entire display panel. The touch panel is of an electrostatic capacitance type, and wiring thereof is formed of ITO (indium tin oxide) that is a transparent conductive film. Although a substrate is generally formed of glass, it is also possible to use a plastic substrate made of acrylic resin, polycarbonate, or the like as long as the plastic substrate is transparent and can cope with an annealing temperature and the like of ITO.

According to the embodiment, it is possible to realize a configuration with which a module can be easily and reliably attached to a device main body without causing any problems in size reduction and thickness reduction. In addition, it is possible to customize the electronic device in accordance with a use purpose of the user. Further, it is possible to handle a case in which the module has to be replaced due to a malfunction or the like or the module has been updated or improved simply with replacement in units of modules. That is, since the device main body can be used as it is, it is possible to provide an inexpensive electronic device that also takes effects on the environment into consideration.

Fourth Embodiment

Next, a fourth embodiment of the present invention will be described. For attaching a module 200 to a device main body 100, attachment and detachment based on the bayonet scheme can be employed by turning the locking member. FIG. 10 is a perspective view in which a state of the device main body 100 with the module 200 attached thereto is viewed from the front face side according to the embodiment. FIG. 11 is a perspective view in which a state of the device main body 100 with the module 200 removed therefrom is viewed from the front face side. FIG. 12 is an exploded perspective view in which a state of the device main body 100 with the module 200 removed therefrom is viewed from the back face side. FIG. 13 is an exploded perspective view of the device main body 100. The device main body 100 is a camera module, and the module 200 is a power source module that has a battery.

The device main body 100 includes an imaging portion 101 that is exposed to a front surface. The imaging portion 101 includes optical members such as a lens and a diaphragm that forms an imaging optical system and an imaging element. Hereinafter, an upper surface of a case body 130 of the device main body 100 is defined as a first surface S1. From among the plurality of side surfaces that substantially perpendicularly intersect the front surface of the case body 130, aside surface near the front surface in which the imaging portion 101 is disposed is defined as a second surface S2, and a side surface, which is different from the second surface S2, of the case body 130 is defined as a third surface S3. Note that a connector portion 120, which will be described later, is disposed on a back face of the device main body 100 on the side opposite to the front surface in which the imaging portion 101 is disposed in an exposed manner. Therefore, the aforementioned first surfaces S1 to the third surfaces S3 are surfaces that are different from the front surface and the back face as described above in the device main body 100. In the embodiment, the second surface S2 is a right side surface when viewed from the front face side, and the third surface S3 is a left side surface when viewed from the front face side. A surface S4 formed in the periphery of the front surface is a tapered surface. The second surface S2 is not adjacent to the third surface S3, and the imaging portion 101 is located in the vicinity of the first surface S1 and the second surface S2. Note that it is only necessary for the imaging portion 101 to be located at least in the vicinity of the first surface S1 (for example, a location on the center upper side or the like) in the front surface of the device main body 100.

A locking operation portion 141 a and operation members 151 and 152 are arranged as operation members in the side surface portion of the case body 130 of the device main body 100. The locking operation portion 141 a is a locking lever that is integrally provided with a locking member 141, which will be described later. The locking operation portion 141 a is disposed in the vicinity of the third surface S3 that is not adjacent to (not in the vicinity of) at least one of the first surface S1 and the second surface S2. In the embodiment, since the locking operation portion 141 a is arranged in the vicinity of (edge) of the first surface S1 and the third surface E3, the locking operation portion 141 a is located at a position that is not adjacent to the second surface S2. As illustrated in FIG. 10, the locking operation portion 141 a is substantially within a projection area in a state in which the module 200 has been attached to the device main body 100, in a case in which the device main body 100 is viewed from the front surface side. In a case of FIG. 11 in which the attachment of the module 200 to the device main body 100 has been released, the locking operation portion 141 a has moved to the position at which the locking operation portion 141 a projects from the projection area outside as represented by the arrow R.

The operation members 151 and 152 are arranged on the first surface S1. The operation member 151 near the locking operation portion 141 a is an operation member for outputting an operation signal in response to a user's operation, and in the embodiment, the operation member 151 is a release button that the user uses when providing an instruction for imaging a subject. In addition, the operation member 152 is an operation member for outputting an operation signal that is different from that of the operation member 151. The operation member 152 is arranged at a position closer to the imaging portion 101 than the operation member 151, that is, at a position near the optical axis of the imaging optical system.

A chassis 140, a circuit substrate portion 150, a heat releasing portion 160, a holding member 170, and a locking member 141 are provided in an internal space formed by the case body 130 and a back face panel 110 of the device main body 100 (FIG. 13). The heat generated by the circuit substrate portion 150 can diffuse to the side of the module 200 via the heat releasing portion 160.

The module 200 includes a case body that can be connected to the device main body 100 by bayonet coupling. The module 200 has a ring-shaped portion 201 in a front surface portion connected to the device main body 100. A plurality of claw portions 201 a are formed in a circumferential direction in the ring-shaped portion 201 and are respectively engaged with a plurality of claw portions formed in the locking member 141. The module 200 has a connector portion 210 inside the ring-shaped portion 201. The connector portion 210 is electrically connected to the connector portion 120 (see FIG. 12) provided in the device main body 100. In the embodiment, the connector portion 210 of the module 200 is a plug that projects forward, and the connector portion 120 of the device main body 100 is a socket.

A plurality of engagement convex portions 230 provided in the front surface portion of the module 200 are engagement pins arranged on both left and right sides of the connector portion 210 outside the ring-shaped portion 201. Engagement concave portions 123 (FIGS. 12 and 14) respectively corresponding to the plurality of engagement convex portions 230 are formed in the back faces of the device main body 100 such that the engagement convex portions 230 are engaged with the engagement concave portions 123 when the module 200 is attached. The plurality of engagement convex portions 230 serves as a guide that guides the module 200 when the user tries to attach the module 200 to the device main body 100 and serves to safely and reliably establish the connection of the connector portion 210. In addition, the plurality of engagement convex portions 230 also serves to protect the connector portion 210. Since the amount of projection of the engagement convex portions 230 is greater than the amount of projection of the connector portion 210 with reference to the front surface of the module 200, it is possible to avoid direct application of impact caused by dropping of the module 200, for example, to the connector portion 210. In addition, concave portions 240 and 250 (FIG. 11) that fit onto convex portions provided in another module device (not illustrated) are formed in a surface of the module 200 which comes into contact with the device main body 100. Since no convex portions corresponding to the concave portions 240 and 250 are provided in the device main body 100, it is possible to distinguish the device main body 100 from another module device in terms of connection. Another module device will be described later with reference to FIGS. 26 and 27.

FIG. 14 is an exploded perspective view illustrating the device main body 100 from the back face side in a partially exploded manner. FIGS. 15A and 15B are exploded perspective views illustrating circumferential portions of the locking member 141 and the heat releasing portion 160. The locking member 141 is arranged between the back face panel 110 of the device main body 100 and the case body 130. In a manner similar to that in the first embodiment, the locking operation portion 141 a, a ring-shaped portion 141 b, and the plurality of claw portions 141 c provided therein are formed as an integrated part in the locking member 141. The claw portions 141 c are bayonet claws. The locking operation portion 141 a and the ring-shaped portion 141 b are integrally turned. The locking member 141 moves between a locked portion at which connection with the module 200 has been established by the bayonet coupling and an unlocked position (lock released position) in which the locking with the module 200 has been released. In a manner similar to in the first embodiment, the locking member 141 is configured to be held in the locked position or the unlocked position by the metal spherical body 121 and the biasing member (elastic member) 122 thereof.

FIGS. 16A and 16B are sectional views for explaining the locked position and the unlocked position of the locking member 141 when viewed from the back face side. FIG. 16A illustrates the locking member 141 in the locked position, and FIG. 16B illustrates the locking member 141 in the unlocked position. FIGS. 17A and 17B are perspective views illustrating an engagement relationship between the locking member 141 and the module 200 from the front surface side. FIG. 17A illustrates a state in which the locking member 141 is in the locked position, and FIG. 17B illustrates a state in which the locking member 141 is in the unlocked position. Note that portions with no direct relationship with the gist of the present invention in the camera 100 and the module 200 are not illustrated.

The locking member 141 is in the state in which the plurality of claw portions 141 c respectively are engaged with a plurality of claw portions 201 a formed in the module 200, in the locked position. At this time, the locking operation portion 141 a is in a state in which the locking operation portion 141 a does not project outside of the projection area in a case in which the device main body 100 is viewed from the front surface side, and the amount of projection in the locked position is less than the amount of exposure in the unlocked position. If the user operates the locking operation portion 141 a, and the locking member 141 is turned in the counterclockwise direction in FIGS. 16A and 16B, engagement between the device main body 100 and the module 200 is released. At this time, the locking operation portion 141 a is in a state in which the locking operation portion 141 a projects to the outside of the projection area in a case in which the device main body 100 is viewed from the front surface side. That is, the locking operation portion 141 a formed to extend from the locking member 141 projects from the external form of the device main body 100 in the unlocked position of the locking member 141.

FIG. 18 is an exploded perspective view illustrating a configuration example of the module 200. The module 200 includes a front surface portion 212, a substrate portion 213, a battery portion 216, and a cover member 218. The connector portion 210 provided in the substrate portion 213 is exposed to the outside through an opening 212 a formed in the front surface portion 212.

In the embodiment, the imaging portion 101 is arranged in the vicinity of the first surface S1 and the second surface S2 of the case body 130 of the device main body 100, and the locking operation portion 141 a is arranged in the vicinity of the first surface S1 and the third surface S3 (FIGS. 10 and 11). For example, the user can operate the locking operation portion 141 a even in a state in which an attachment is attached to the lens of the imaging portion 101. The attachment includes, for example, a lens hood, a wide-angle attachment that increases an angle of view in which imaging can be performed, a fish-eye attachment that enables fish-eye imaging, and the like and can be attached to the imaging portion 101. It is not necessary for the user to perform complicated operations in relation to the attachment and the detachment between the device main body 100, to which the attachment has been attached, and the module 200. In addition, the user can minimize damage to the lens and adhesion of fingerprints on the front surface of the lens when the user operates the locking operation portion 141 a in an application to a small-sized camera module.

Next, a relationship between the locking operation portion 141 a and the operation member 151 will be described with reference to FIGS. 10 to 16. The operation member 151 is arranged in the first surface S1 of the device main body 100, and the amount of protrusion thereof is represented as L1 (see FIG. 10). The operation member 151 according to the embodiment is a release button used by the user to provide an instruction for capturing an image, and an operation direction P is a pressing direction.

If the amount by which the locking operation portion 141 a projects is represented as L2, the amount of projection from the external form of the device main body 100 in the locked position in FIG. 16A (hereinafter, referred to as L2) is substantially zero, which is equal to or less than the amount by which the operation member 151 projects. Meanwhile, the amount L2 by which the locking operation portion 141 a projects is greater than the amount L1 by which the operation member 151 projects (L2>L1) in the unlocked position in FIG. 16B. At this time, the locking operation portion 141 a is located at a position at which the locking operation portion 141 a overlaps the operation member 151 when the device main body 100 is viewed from the first surface side (upper side). The direction in which the user operates the locking operation portion 141 a when the user performs a locking release operation is a direction in which the locking operation portion 141 a projects from the first surface S1.

For example, a case in which a release operation has been performed in the unlocked state and an imaging operation has been performed can be assumed. In this case, there is a likelihood that if the connection between the device main body 100 and the module 200 is unexpectedly released, a captured image will not be able to be recorded for the reason that power is not being supplied or the like. In the embodiment, it is possible to prevent an inadvertent operation on the device main body 100 in the unlocked state (locking released state). That is, the operation direction of the locking operation portion 141 a in a case in which the locking is released is substantially an opposite direction to the operation direction (pressing direction) of the operation member 151. If the user operates the operation member 151 in the pressing direction and a finger is then inadvertently brought into contact with the locking operation portion 141 a, the unlocked state is not achieved. Therefore, this is effective in preventing inadvertent operations. In addition, the amount by which the locking operation portion 141 a projects is greater than the amount by which the operation member 151 projects with reference to the first surface S1 in the unlocked state. Therefore, it is possible to prevent the release operation on the operation member 151 by the user in the unlocked state.

In addition, the operation member 152 is at a closer position to the optical axis of the imaging portion 101 than the operation member 151 on the first surface S1 of the device main body 100. Therefore, there is substantially no likelihood of inadvertent operations due to contact of a finger with the locking operation portion 141 a when the user operates the operation member 152. Note that this operation member 152 is less frequently operated during image capturing than the operation member 151. That is, it is possible to prevent an input of an unintended operation by the user in the unlocked state in a case in which it is necessary to arrange the operation member 151 that is more frequently operated during the image capturing so as to be closer to the projecting position of the locking operation portion 141 a in the unlocked state.

Next, heat transfer from the device main body 100 to the module 200 will be described with reference to FIGS. 19A and 19B. FIG. 19A is a vertical sectional view illustrating a state in which the module 200 has been attached to the device main body 100. FIG. 19B is an enlarged view illustrating a B portion in FIG. 19A. FIG. 20 is an enlarged view illustrating the B portion in FIG. 19A and is a diagram for explaining a case in which a heat transfer member 214 is not provided.

The attachment of the module 200 to the device main body 100 is performed by a first mount portion M1 provided in the back surface portion of the device main body 100 and a second mount portion M2 provided in the front surface portion of the module 200. The first mound portion M1 has a first mount reference surface MS1 formed in the circumferential direction. In addition, the second mount portion M2 has a second mount reference surface MS2 formed in the circumferential direction so as to face the first mount reference surface MS1. The second mount reference surface MS2 corresponds to a front end surface of the ring-shaped portion 201 and comes into contact with the first mount reference surface MS1 in a locked state.

The device main body 100 includes a heat releasing member 107 provided to project backward (the side of the module 200) inside the first mount portion M1 and beyond the first mount reference surface MS1. The heat releasing member 107 is a member that releases heat generated by a heat source inside the device main body 100 in a manner similar to that of the heat releasing panel 7 described above in the first embodiment.

The claw portions 141 c of the locking member 141 project backward beyond the first mount reference surface MS1. The module 200 includes a contact surface 201S that can be engaged with the claw portions 141 c in a state in which the module 200 can be attached to the device main body 100 from the back side. The contact surface 201S is formed in the ring-shaped portion 201 in the second mount portion M2 and is located behind the second mount reference surface MS2. A concave portion 206 is formed inside the second mount portion MS2 in order to reduce interference with the heat releasing member 107. The concave portion 206 is formed behind the second mount reference surface MS2, and a heat transfer member 214 that transfers heat from the heat releasing member 107, for example, is arranged in the concave portion. Since the heat transfer member 214 is similar to the heat transfer member 14 in the first embodiment, detailed description thereof will be omitted.

In the embodiment, it is possible to separate the heat releasing member 107 formed of a metal material or the like from the case body 130 of the device main body 100 by causing the heat releasing member 107 to project beyond the first mount reference surface MS1. In addition, the heat releasing member 107 is arranged inside the first mount portion M1 formed in the circumferential direction. Therefore, it is possible to secure a sufficient heat releasing area, to increase the contact area between the claw portions 141 c and the contact surface 201S, and to improve strength. Since the concave portion 206 is formed in the module 200, it is possible to reduce interference with the heat releasing member 107 in the state in which the module 200 is attached to the device main body 100. In a case in which the heat transfer member 214 is arranged in the concave portion, the heat transfer member 214 is in contact with the heat releasing member 107, however, it is possible to sufficiently reduce the interference between the members as long as the heat transfer member 214 and the heat releasing member 107 are configured to be able to elastically contact in contact with each other. In addition, in a case in which the module has a cooling portion, the heat generated in the device main body 100 is accumulated through the concave portion 206. Note that although the contact surface 201S that can be engaged with the claw portions 141 c is exemplified as a surface perpendicular to the optical axis direction in the embodiment, the contact surface 201S may be a surface at any predetermined angle with respect to the optical axis direction. In addition, in a case in which the module 200 is configured not to include the heat transfer member 214 as illustrated in FIG. 20, a clearance occurs between the heat releasing member 107 and the concave portion 206 in a state in which the module 200 has been attached to the device main body 100. It is also possible to reduce, due to the concave portion 206, the interference from the heat releasing member 107 in the state in which the module 200 has been attached to the device main body 100 in this case.

Here, a positional relationship between the heat releasing member 107, the connector portion 120, the engagement concave portions 123, a locking operation portion 141 a, a connector portion 210, and an engagement convex portion 230 will be described in detail with reference to FIGS. 11 and 12. The connector portion 120 is disposed below the heat releasing member 107 in the back face of the device main body 100. Therefore, the connector portion 210 is disposed above the concave portion 206 in the front surface of the module 200 in a state in which the module 200 has been attached to the device main body 100. With this configuration, it is possible to reduce a degree at which the heat diffused from the heat releasing member 107 is delivered to the connector side in a normal position (first state) of the device main body 100, which is the most frequently used, in which the first surface S1 faces the side opposite to a direction or gravity, as illustrated in FIG. 10.

In addition, the engagement concave portions 123 are provided in the vicinity of the connector portion 120 and on the outer side of the connector portion 120 (on the side closer to the external form of the case body 130) in the back face of the device main body 100. In addition, the engagement concave portions 123 are provided in the vicinity of two corners that are different from two corners near the locking operation portion 141 a, from among the four corners of the back face of the device main body 100 on the side opposite to the locking operation portion 141 a with the connector portion 120 interposed therebetween. Therefore, the engagement convex portions 230 are provided in the vicinity of the connector portion 210 and on the side opposite to a region of the module 200 that faces the locking operation portion 141 a in a state in which the device main body 100 has been attached to the module 200 with the connector portion 210 interposed therebetween, in the front surface of the module 200. Note that a positional relationship in which a tangential line of the two engagement convex portions 230 is substantially parallel with a side of the connector portion 210 in the longitudinal direction is achieved. With the aforementioned configuration, it is possible to minimize the external form dimensions of the device main body 100 and the module 200. In addition, since it is possible to increase a probability of the engagement convex portion 230 being brought into contact with the outside before the connector portion 210 in a state in which the connector portion 210 is exposed to the outside, for example, it is possible to more effectively protect the connector portion 210.

Next, measures for water proofing and prevention of entry of foreign matter will be described with reference to FIGS. 19A and 19B.

A convex portion 126 is formed inside the first mount portion M1 in the device main body 100. The convex portion 126 is located further inside the first mount reference surface MS1 and projects backward (the side of the module 200) beyond the first mount reference surface MS1. The convex portion 126 is formed in the circumferential direction so as to surround the connector portion 120. The claw portions 141 c formed in the locking member 141 that is a turning member are located on the outer circumferential side beyond the convex portion 126 and extend inward at positions projected backward beyond the first mount reference surface MS1. That is, a part of claw portions 141 c are at the same position as that of the first mount reference surface MS1 in the radial direction that perpendicularly intersects the optical axis when viewed from the optical axis direction. The part of the claw portions 141 c are at a position at which the part overlaps the first mount reference surface MS1 in a direction parallel to the optical axis. Therefore, it is possible to prevent water and foreign matter from entering between the claw portions that fasten the device main body 100 and the module 200 and to prevent loosening of the engagement relationship between the claw portions.

When the module 200 is attached to the device main body 100, the claw portions 201 a of the ring-shaped portion 201 and the claw portions 141 c of the locking member 141 are engaged with each other. The claw portions 201 a are located between the first and second mount reference surfaces and the claw portions 141 c in a state in which the second mount reference surface MS2 is in contact with the first mount reference surface MS1. That is, the contact surface 201S is a contact surface with the claw portion 141 c in the second mount portion M2.

An escape portion 226 for reducing interference with the convex portion 126 is formed on the inner peripheral side of the second mount portion MS2. The escape portion 226 is a portion recessed backward beyond the second mount reference surface MS2. The convex portion 126 enters the escape portion 226 in a state in which the module 200 has been attached to the device main body 100. Although the escape portion 226 may have a U shape to fit onto the convex portion 126 in the embodiment, any shape may be employed as long as the convex portion 126 can escape thereinto. For example, a configuration in which a part of the wall surface in a direction parallel to the optical axis (the wall surface in the inward direction in the module 200, for example) from the wall surfaces that form the escape portion 226 is not provided may be employed. In addition, a configuration in which a buffer member 227 that has a sealing function, for example, is arranged in a gap between the escape portion 226 and the convex portion 126 as illustrated in FIG. 20 may be employed. With this configuration, it is possible to more effectively curb invasion of water and foreign matter into the device as compared with a case in which the buffer member 227 is not provided.

In the embodiment, it is possible to enhance a water proofing effect and a foreign matter invasion prevention effect by hook-like engagement using the claw portions 141 c that extend inward from the locking member 141 and the claw portions 201 a that extend outward from the module 200. The claw portions 141 c of the locking member 141 extend inward at a position projecting beyond the first mound reference surface MS1, at least a part thereof is located in the same radial direction as that of the first mount reference surface MS1, and the first and the second mount reference surfaces are brought into contact with each other. Further, it is possible to more reliably prevent invasion of water and foreign matter and to protect the connector portion 120 of the device main body 100 and the connector portion 210 of the module 200 by forming the convex portion 126 inside beyond the first mount reference surface MS1. Note that although the connector portions that establish electrical connection between the devices has been exemplified in the embodiment, the embodiment is not limited thereto. The embodiment may be applied to an electronic device that has various connection members that perform thermal connection and the like.

Referring to FIGS. 10 to 17, 21, and 22, an engagement relationship between the claw portions 141 c of the locking member 141 and the claw portion 201 a of the module 200 and a measure for preventing backlash therebetween will be described. FIG. 21A illustrates a state in which the claw portions 141 c of the locking member 141 and the claw portions 201 a of the ring-shaped portion 201 of the module 200 are engaged with each other when viewed in the optical axis direction of the imaging optical system. FIGS. 21B and 21C illustrate a positional relationship when the claw portions 141 c are engaged with the claw portions 201 a when viewed from the direction perpendicular to the optical axis direction of the imaging optical system. FIG. 21B illustrates a state in which the claw portions are engaged with each other, and FIG. 21C illustrates the claw portions 201 a of the ring-shaped portion 201 of the module 200. FIGS. 22A and 22B illustrate the locking member 141 as an example. FIG. 22A is a back view of the device main body 100, and FIG. 22B is a perspective view illustrating the locking member 141. Although the claw portions 141 c are formed at a substantially equal intervals at six locations in the ring-shaped portion 141 b in another example illustrated in FIGS. 22A and 22B, the number of claw portions 141 c can be arbitrarily set.

The ring-shaped portion 141 b of the locking member 141 includes the plurality of claw portions 141 c formed at a substantially equal interval in the circumferential direction. A first claw portion 141 c 1 (FIG. 14) from among the plurality of claw portions is formed on the side opposite to the locking operation portion 141 a with the ring-shaped portion 141 b interposed therebetween. In other words, the locking operation portion 141 a and the first claw portion 141 c 1 are formed to extend from the ring-shaped portion 141 b in a state in which parts thereof overlap with each other in the radial direction of the ring-shaped portion 141 b. A third claw portion 141 c 3 is formed at a position at which the third claw portion 141 c 3 faces the first claw portion 141 c in the ring-shaped portion 141 b.

A second claw portion 201 a 2 (FIG. 11) that is engaged with a first claw portion 141 c 1 of the locking member 141 is formed, and a fourth claw portion 201 a 4 that is engaged with a third claw portion 141 c 3 of the locking member 141 is formed in the ring-shaped portion 201 of the module 200. As illustrated in the circular frame 2001 in FIG. 21A, the thickness of the second claw portion 201 a 2 in the direction perpendicular to the optical axis increases in a stepwise manner in a direction in which the locking member 141 moves from the unlocked position to the locked position when viewed from the optical axis direction of the imaging optical system. If the locking member 141 is turned toward the locked position, the first claw portion 141 c 1 moves over a tapered portion and moves to the position at which the first claw portion 141 c 1 is engaged with the second claw portion 201 a 2. That is, it is possible to reduce or eliminate the backlash in the radial direction at the time of the locking operation by forming the tapered portion in the circumferential direction (radial direction). In addition, an inclined portion 2101 with a thickness that varies in the optical axis direction of the imaging optical system is formed in the second claw portion 201 a 2 as illustrated in FIGS. 21(B-1) and (B-2). It is possible to reduce or eliminate backlash in the optical axis direction at the time of the locking operation by forming the tapered portion in the direction (thrust direction) parallel to the optical axis. Note that since other claw portions 201 a also have a shape similar to that illustrated in FIG. 21A to 21C, detailed description thereof will be omitted.

A location with a highest likelihood that water, foreign matter, and the like will enter in a state in which the module 200 has been attached to the device main body 100 is the position of the locking operation portion 141 a in the circumferential direction of the locking member 141. Therefore, it is effective to provide the first claw portions 141 c in the vicinity of the locking operation portion 141 a in terms of curbing of invasion of water or the like into the device main body 100. In this manner, the water proofing performance of the locking member 141 in the locked position is enhanced.

In the embodiment, it is possible to curb backlash between the device main body 100 and the module 200 by arranging the plurality of claw portions at an equal interval in the circumferential direction. In addition, it is possible to disperse a force (shear force) applied to the claw portions when the user tries to pull the module 200 away from the device main body 100 and to thereby avoid excessive force acting on the claw portions.

In addition, the second claw portion 201 a 2 and the fourth claw portion 201 a 4 (FIG. 11) have different maximum thicknesses in the direction perpendicular to the optical axis of the imaging optical system, and the fourth claw portion 201 a 4 has a greater maximum thickness than that of the second claw portion 201 a 2 in the embodiment. Backlash is easily removed by increasing the thickness of one of two claw portions that face each other in the radial direction. In addition, it is possible to minimize the gap between the device main body 100 and the module 200 at the formation position of the locking operation portion 141 a that can be an entry route for water or the like, which is advantageous as a measure for drip proofing and a measure for dust proofing.

FIG. 23 is a diagram illustrating an example in which an extension module 300 is connected and used for a power source module attached to the device main body 100. The extension module 300 includes a first interface portion 301, a cable 302, and a second interface portion 303. For example, it is possible to extend the operation time of the device by extending the device main body 100 and a power source module 500 with a larger power capacity than that of the aforementioned module 200 with the extension module 300. Since such a use form is available, convenience for the user is improved. FIGS. 24 and 25 illustrate specific examples.

A plurality of concave portions 501 (FIG. 25) are provided in a surface in contact with the second interface portion 303 in the power source module 500. A plurality of convex portions 303 a (FIG. 24) are provided to extend at positions that respectively correspond to the plurality of concave portions 510 in the second interface portion 303 in a connection state between the power source module 500 and the second interface portion 303. With this configuration, it is possible to prevent connection between the same types of modules, for example, and to thereby prevent the modules, for which connection is not allowed, from being coupled to each other.

FIGS. 26 and 27 are diagrams illustrating, as an example, a relay module 700 that is interposed between the device main body 100 and the power source module 200. A plurality of convex portions 701 (FIG. 26) are formed in the back surface portion of the relay module 700. The concave portions 240 and 250 (FIG. 27) are formed at positions that respectively correspond to a plurality of convex portions 701 in the power source module 200 in a connection state between the relay module 700 and the power source module 200. With this configuration, it is possible to prevent the modules, for which connection is not allowed, from being coupled to each other. Note that although the configuration in which a heat releasing member such as the aforementioned heat releasing member 107 of the device main body 100 is not provided at the interface portion of each module has been described with reference to FIGS. 23 to 27, a configuration in which the heat releasing member is provided may be employed. For example, a configuration in which a contact surface of the relay module 700 with the module 200 includes a heat releasing member that projects to correspond to the concave portion 206 of the module 200 in a manner similar to the heat releasing member 107 of the device main body 100 may be employed.

Fifth Embodiment

Next, a fifth embodiment of the present invention will be described. Only differences between this embodiment and the fourth embodiment will be described, and detailed description of components similar to those in the fourth embodiment will be omitted by using the reference numerals that have already been used. For attachment of the module 200 to the device main body 100, attachment and detachment based on a bayonet scheme are possible by the locking member being turned.

FIG. 28 is a perspective view in a case in which a state of the module 200 removed from the device main body is viewed from the front face side. The device main body 100 is a camera module, and the module 200 is a power source module that has a battery.

The module 200 includes a case body that can be connected to the device main body 100 by bayonet coupling. The module 200 has the ring-shaped portion 201 at a front surface side for connection to the device main body 100. The plurality of convex portions 201 a are formed in the ring-shaped portion 201 in a circumferential direction in a manner similar to that in the aforementioned module 200 according to the fourth embodiment, and a total of six convex portions 201 a are formed at substantially equal intervals in the circumferential direction in the embodiment. Claw portions 201 b are formed so as to further extend from the convex portions 201 a at four convex portions 201 a beyond the convex portion 201 a, and the amount of projection of the module 200 in the radial direction from the center is greater at the claw portions 201 b than at the convex portions 201 a. The convex portions 201 a have stepped portions in a direction parallel to the optical axis (a direction parallel to a projection direction of the engagement convex portions 230 of the module 200) when the module 200 is connected to the device main body 100. Groove portions 201 c are formed by the stepped portions. The groove portions 201 c are formed on the back face side at positions at which the claw portions 201 b are formed to extend therefrom, for example, in the aforementioned direction parallel to the optical axis. In other words, the claw portions 201 b and the groove portions 201 c overlap with each other in the optical axis direction. The groove portions 201 c engage with a plurality of claw portions (see FIG. 30: 141 c) formed at the locking member 141 on the side of the device main body 100.

In the module 200 according to the embodiment, the amount of fitting between the claw portions 201 b of the module 200 and the locking member 141, which will be described later, of the device main body 100 in the radial direction is increased by providing the claw portions 201 b that project in the radial direction of the ring-shaped portion 201 as compared with the aforementioned fourth embodiment. With this configuration, the strength of impact when the device main body 100 with the module 200 attached thereto falls and the strength of the static pressure when a load is applied to the module 200 increase. Therefore, it is possible to prevent the connection between the devices from being released (falling off) in a state in which the connection between the device main body 100 and the module 200 is locked by the locking member 141.

The plurality of engagement convex portions 230 provided at the front surface portion of the module 200 are engagement pins that are respectively arranged on both right and left sides of the connector portion 210 outward from the ring-shaped portion 201. The engagement concave portions 123 (FIGS. 12 and 14) that respectively correspond to the plurality of engagement convex portions 230 are formed on the back face of the device main body 100, and the engagement convex portions 230 engage with the engagement concave portions 123 when the module 200 has been attached. The plurality of engagement convex portions 230 serves as a guide that provides guidance when the user attaches the module 200 to the device main body 100 and allows for safe and reliable connection of the connector portion 210. In addition, the engagement convex portions 230 also serve to protect the connector portion 210. Since the amount of projection of the engagement convex portions 230 is greater than the amount of projection of the connector portion 210 with reference to the front surface of the module 200, it is possible to avoid direct application of impact due to dropping of the module 200, for example, to the connector portion 210. Next, the diameter dimension of the engagement convex portions 230 according to the embodiment differs from that of a base portion toward a leading end (projecting) portion and is formed such that the dimension of a seating 230 a becomes the largest in contrast to the aforementioned embodiment 4. The engagement concave portions 123 that have steps that can be fitted onto the engagement convex portions 230 are formed in the device main body 100. With this configuration, it is possible not only to stabilize the engagement state between the engagement convex portions 230 and the engagement concave portions 12 but also to improve the strength of the engagement convex portions 230.

FIG. 29 is a back view of the device main body 100 according to the embodiment. In addition, FIG. 30 is a perspective view for explaining the locking member 141 in the device main body 100 according to the embodiment. As illustrated in FIGS. 29 and 30, six claw portions 141 c are formed at substantially equal intervals in the circumferential direction of the ring-shaped portion 141 b of the locking member 141. Note that the number of claw portions 141 c is not limited to six and can be set to an arbitrary number. As compared with the aforementioned fourth embodiment, a groove portion 141 d that is recessed in the outer radial direction beyond the inner circumferential surface of the ring-shaped portion 141 b (a direction away from the center of the ring-shaped portion 141 b) and a fitting portion 141 e are formed in the locking member 141 according to this embodiment.

If the module 200 is attached to the device main body 100 in a state in which the locking member 141 is located at the locking released position, the plurality of claw portions 201 b of the module 200 are located at (inserted into) the groove portion 141 of the locking member 141. The claw portions 201 b of the module 200 are moved to the fitting portion 141 e of the locking member 141 by operating the locking member 141 such that the locking member 141 is caused to move from this state to the locked position. This state will be described with reference to FIGS. 31 and 32.

FIG. 31 is a diagram of the electronic device in a locked state in which the device main body 100 and the module 200 have been connected according to the embodiment when viewed from the back face side. FIG. 31 does not illustrate parts of the module 200 that are unnecessary for explanation. In addition, FIG. 32 is a partial sectional view. FIGS. 32(A) and 32(B) are a sectional view taken along the A-A portion and a sectional view taken along the B-B portion illustrated in FIG. 31, respectively.

As illustrated in FIG. 32(A), the module 200 is fixed to the device main body 100 by the claw portions 201 b of the module 200 and the claw portions 141 c of the device main body 100 becoming engaged with each other. At this time, the groove portion 141 d and the fitting portion 141 e are newly provided in the locking member 141 according to the embodiment in contrast to the aforementioned embodiment 4. This leads to an increase in the area in which the claw portions 201 b (or the projecting portions 201 a) are brought into contact with the claw portions 141 c when the locking member 141 is located at the locked position. In addition, the contact area between the holding member 170 and the claw portions 201 b also increases.

With this configuration, it is possible to prevent the connection between the devices from being released (falling off) in the locked state by the locking member 141 when the device main body 100 and the module 200 are connected to each other. Note that a gap X is provided such that the locking member 141 can rotate in a state in which the locking member 141 is interposed between the holding member 170 and the back face panel 110 in the embodiment as illustrated in FIG. 32(A). It is possible to reduce sliding friction between the locking member 141 and another member when the locking member 141 is rotated by providing the gap X.

In addition, a plurality of standing wall portions 170 a that engage the inner circumferential surface of the ring-shaped portion 141 b of the locking member 141 are formed to extend at substantially equal intervals in the circumferential direction in the holding member 170 as illustrated in FIG. 29. Note that although the case in which a total of six standing wall portions 170 a are formed in the holding member 170 has been described in this embodiment, the number of standing wall portions 170 a is not limited thereto and can be arbitrarily set.

As illustrated in FIG. 32(B), the standing wall portions 170 a are formed to extend backward (on the side of the module 200) such that a predetermined pressure is applied to the inner circumferential surface side of the ring-shaped portion 141 from the inside of the ring-shaped portion 141 b. Therefore, it is possible to suppress deformation of the ring-shaped portion 141 b of the locking member 141 with the standing wall portions 170 a and to prevent the locking member 141 from falling from the back face panel 110 even in a case in which excessive force is applied to the module 200.

According to the present invention, it is possible to provide a small electronic device that can be used with a second device reliably attached to a first device.

Note that the configuration of the present invention is not limited to the illustrated examples, and materials, shapes, dimensions, forms, numbers, arrangement locations, and the like can be appropriately changed without departing from the gist of the present invention.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions. 

The invention claimed is:
 1. An electronic device that is able to be attached, through bayonet coupling, to a camera module that includes (i) a heat releasing member that is provided inside a first mount portion and extends in a first direction and (ii) a claw portion, the electronic device comprising, in a state in which the electronic device is attached to the camera module in a second direction that is opposite to the first direction: a contact surface that able to engage with the claw portion, a second mount portion that has a contact surface that is able to contact with the first mount portion and a reference surface that is able to contact with the first mount portion; and a first concave portion that reduces interference with the heat releasing member by being formed inside the second mount portion and in the first direction beyond the reference surface.
 2. The electronic device according to claim 1, wherein, in a state in which the electronic device is attached to the camera module, the first concave portion is insertable into the heat releasing member that is extending in the first direction beyond the reference surface.
 3. The electronic device according to claim 2, wherein the second mount portion is formed by ring-shaped that has a plurality of the reference surfaces along a circumferential direction of the second mount portion.
 4. The electronic device according to claim 1, further comprising a second concave portion caved in the first direction, wherein the second concave portion is different from the first concave portion and is disposed outside the second mount portion.
 5. The electronic device according to claim 1, further comprising a convex portion that is extending in a second direction opposite to the first direction and is able to engage with a concave of the camera module in a state in which the electronic device is attached to the camera module, wherein the convex portion is disposed outside the second mount portion.
 6. The electronic device according to claim 5, further comprising a second connector portion that is able to be electrically connected to a first connector portion of the camera module, wherein the second connector portion is extending in a second direction, and wherein the convex portion is disposed in the vicinity of the second connector portion.
 7. The electronic device according to claim 6, wherein the diameter dimension of the convex portion in the second direction is different.
 8. The electronic device according to claim 6, further comprising a second connector portion that is able to be electrically connected to a first connector portion which is provided on the camera module, wherein the second connector portion extends in the second direction and is disposed on a lower side than the first concave portion.
 9. The electronic device according to claim 5, wherein the convex portion projects beyond the second connector portion in the second direction.
 10. A camera module that has an imaging portion that is exposed to a front surface and a first connector portion that is provided on a back face on an opposite side to the front surface, the camera module being able to be connected to a device that includes a second connector portion that is able to be electrically connected to the first connector portion, the camera module comprising: a first mount portion that has a reference surface formed in a circumferential direction on the back face of the camera module; a heat releasing member that is provided inside the first mount portion; and a claw portion is used for bayonet coupling between the camera module and the device, wherein the first connector is extending in a first direction.
 11. The camera module according to claim 10, wherein the heat releasing member is insertable to a first concave portion of the device which is caved in the first direction.
 12. The camera module according to claim 11, further comprising a second concave portion caved in a second direction opposite the first direction and disposed the vicinity of the first connector portion, and wherein, in a state in which the camera module is coupled with the device, the second concave portion is fitted onto a convex portion is provided on the device.
 13. A camera module that has an imaging portion that is located on a front surface and a first connector portion that is provided on a back face on an opposite side to the front surface, on and from which an electronic device is able to be attached, the camera module comprising: a locking member configured to be used to lock a state of the camera module and the electronic device from a unlock state to a lock state; a locking operation member for operating the locking member; and a first operation member configured to be used to output an operation signal in response to a user's operation, wherein, in a case where the state of the camera module and the electronic device is the unlock state, the locking operation member projects from an external form of the camera module when viewed from the front surface of the camera module, and wherein the first operation member is disposed in the vicinity of the locking operation member.
 14. The camera module according to claim 13, wherein first, second and third surfaces of a case body of the camera module are surfaces different from the front surface and the back surface of the camera module, wherein the imaging portion is disposed in the vicinity of the first surface in the front surface of the camera module, wherein the locking operation member is disposed in the vicinity of the third surface of the camera module, and wherein the third surface is a surface that is adjacent to the first surface and not adjacent to the second surface.
 15. The camera module according to claim 14, wherein the first operation member is disposed in the first surface, wherein, in a case where the state of the camera module and the electronic device is the lock state, an amount of projection of the locking operation member from the external form of the camera module is equal to or less than an amount of projection of the first operation member, and wherein, in the case where the state of the camera module and the electronic device is the unlock state, an amount of projection of the locking operation member from the external form of the camera module is greater than an amount of projection of the first operation member.
 16. The camera module according to claim 15, wherein the locking operation member is located at a position at which the locking operation member overlaps with the first operation member at the unlock state in a case in which the camera module is viewed from the side of the first surface.
 17. The camera module according to claim 13, wherein the first operation member is a member that is used for providing an instruction for imaging an object.
 18. The camera module according to claim 13, wherein the locking operation member that is formed to extend from the locking member, wherein the locking member includes a ring-shaped portion and a plurality of claw portions that are disposed in a circumferential direction in the ring-shaped portion, and wherein a first claw portion in the plurality of claw portions are formed on an opposite side to the locking operating member with the ring-shaped portion interposed there between.
 19. An electronic device that is able to be connected, through bayonet coupling, to the camera module according to claim 18, the electronic device comprising: a second claw portion that engages the first claw portion, wherein a thickness of the second claw portion increases in a stepwise manner in a direction in which the locking member rotates from the unlock state to the lock state.
 20. The electronic device according to claim 19, wherein in a state in which the electronic device is connected to the camera module, the second claw portion has a projecting portion that is formed to extend in a radial direction perpendicular to an optical axis direction as compared with the other part of the second claw portion and a first groove portion to which the first claw portion of the camera module is fitted in the optical axis direction, and wherein the projecting portion overlaps with the first groove portion in the optical axis direction.
 21. The electronic device according to claim 18, wherein the plurality of claw portions are disposed at equal intervals in the ring-shaped portion, and wherein a third claw portion in the plurality of claw portions is formed at a position at which the third claw portion faces the first claw portion in the ring-shaped portion.
 22. An electronic device being mountable on and dismountable from a camera module, through bayonet coupling, the electronic device comprising: a mount portion that has a mounting reference surface which is formed in a circumferential direction; a second connector portion that is able to connect with a first connector portion which is provided on the camera module; wherein the second connector portion is disposed inside the mounting reference surface in relation to a center of the mount portion; and a concave portion is caved in a first direction than the mounting reference surface, wherein the second connector portion is extend in a second direction opposite to the first direction, and wherein the concave portion is disposed inside the mount portion in relation to the center of the mount portion.
 23. The electronic device according to claim 22, wherein the mount portion has a plurality of claw portions that are disposed outside the second connector portion and the concave portion in relation to the center of the mount portion, and wherein, in a case where the electronic device is mounting on the camera module, the mounting reference surface is brought into contact with a contact surface of the camera module, and a convex portion of the camera module is inserted into the concave portion. 